Pearl edge attachment for sewing machines



Apnl 9, 1940. s. FOWLER Q PEARL EDGE ATTACHMENT FOR SEWING MACHINES Original Filed June 26, 1937 WHIHH E :1. I T I M Q 10 22 F 3 9 I6 I w u 36 l4'" V Y v u E6 1 o 25 go/3| 1 K28 2,2 54 9 INVENTOR Gllbert Fowler Patented Apr. 9, 1940 2 19 962 UNITED STATES PATENT OFFlCE PEARL EDGE ATTACHMENT Fon'sEwING MACHINES Gilbert Fowler, Bayonne, N. J.

Application June 26,1937, Serial No. 150,468

Renewed September 9, .1939

1 Claim. (Cl. 1125160) My present invention relates to sewing ma- Fig. 2is a irontelevation ofthe structureshown chines and more particularly to animproved atin Fig. 1. tachment for sewing machines for producing Fig.3 is a bottom plan view of Fig. 2. pearl edges on fabrics. Fig. 4 is a plan view of a piece of fabric having I 5 My invention is particularly adapted as an pearl edging thereon made'by the device shown 5 attachment for ordinary sewing machines, and in Figs. 1,2 and 3. in which the main working portionsare located Referring to the drawing, l0 designates the base beneath the base of the sewing machine and in or bottom plate of lock-stitch sewing machine, which the parts which contact with the work to and on the under face of the base III is an inteproduce the pearl edging extend through a slot gral bearing H in which is rotatably mounted 10 in the usual plate in the base of the machine and the 'usual main drive shaft l2. The shaft l2 vis cooperates with the presser-foot of the machine, driven "from any-suitable source of power (not and operates in synchronism therewith to form shown) and carries on one end the bobbin casthe pearl edge on fabric being passed through the ing 13 for holding the usual bobbin of thread.

"15 machine. The basebottom plate I0 is ordinarily provided 16 An advantage of my invention is that it conwith an orifice closed by a plate [4, secured in stitutes an attachment to the ordinary. sewing position in any convenient manner, as by screws machine, and may be removed therefrom and I5 and which plate is provided with a perforaattached thereto without in any way effecting the tion l6 through which passes the needle. The

'20 operation of the sewing machine. The attachplate I4 is also provided with a plurality of slots '20 ment is such that it may be quickly attached to H through which extend the material feed (not or removed from a sewing machine, and the atshown) which cooperates with the resser-foot tachment'is of such character that no particular 18. -Asis usually, the presser-foot normally rests skill'is necessary to adjust the same with regard on the-plate li when the machine is in operation.

to the working parts of the sewing machine. The presser-foot is adjustably mounted on a rod 25 device should have lubrication thereon.

'As the main working portions of the attach- I!) by thumb screw 20, the rod being yieldably ment are located beneath the base of the sewing held'in the usual head (not shown) of the sewing machine, the actual'workin'gportions of the mamachine. chine itself are all that are ordinarily visible. The above is the-construction of the usual sew- 30 With my device in working position the top of ing machine to which my present invention may =30 the sewing machine is 'free of all mechanism be applied. 'I prefer to make my device in the which would tend to disarrange or'soil the goods form of an attachment which may be readily atbeing worked upon, which is an advantage as tac'h'ed to or detached from the sewing machine. obviously the working parts of any mechanical As ithe-operating mechanism of my device is to An'obje'ct of my invention isan improved pearl and the'bobbin holder I3, I prefer to attach the edging attachment for sewing machines. driving connection with my device directly to the An object of my invention is 'a pearl edge atmain shaft 12 of the sewing machine and, there- 'tachment forsewingmachines which is capable of fore, have shown the driving mechanism as a,

4;) attachment to the under side of a base of a "sewworm 2| attached-to the main drive shaft I2 of 40 ing machine. the-machine by-the set screws 22, or in any other An object of my invention is apearl edge atsuitable manner. v tachm'ent for sewing machines which may be In'one-embodi-ment of my invention, the attachattached to the under side of the base of the ment comprises a plate 23 having at one end machine, and only the portion operating in conthereof an arm 24 secured thereto in any con- 45 junction with presser-foot of the sewing mavenient manner, as by screws or by riveting. In chine extends above the base of the sewing mathe arm 24 and plate 23, are aligned bearings in chine. which is rotatablymounted a shaft 25. This shaft Other objects and novel features of the con- 25, between the plate 23 and arm 24' has sestruction of the device will appear as the descripcured thereto a cam 26 and worm wheel 21, the 60 tion of the invention progresses. I worm wheel 21 meshing with and being driven In the accompanying drawing: by the worm 2| attached to the main shaft l2. Fig.- 1 is a plan view of a portion of a base The cam 26 is of a shape to produce the desired of a sewing machine to which my present inventype of pearl edging on fabric to be operated upon.

tion has been applied. The cam 26 imparts a reciprocatory motion to 55 move in synchronism with the needle (not shown) 36 a bar 28. One end of the bar 28 is slidably mounted in a guide 29, secured to the plate 23, and the other end is provided with a fork 39 which is slidably mounted on a screw 3 l attached to the plate 23. The bar 28 is continuously urged toward the cam 26 by a spring 32, one end of which is attached at the point 33 to the bar 28, and the other to the point 34 on the arm 2 The end of the bar 28 which engages with the cam 26 is preferably rounded as indicated by the reference numeral 35.

The reciprocatory bar 28 carries the arm or member 36 and carries the same in such form as to have it readily removable therefrom, as by the screws 31. This arm 36 has one end thereof extending upwardly through the elongated slot 38, formed in the removable plate Id. The up.-'

per end of the arm 36 which extends through the slot 38 is provided with a device by means of which a pearl edge forming blade 39 may be' removable and adjustable attached thereto, as by threading to receive a screw 40.

The pearl edge forming knife or blade 39 being attached to the upper end of the arm 36, and the arm 36 being attached to the reciprocable bar 28, the blade 39 reciprocates transversely of the presser-foot I8 as shown in Figs. 1 and 2. The ordinary presser-foot may be employed by forming a slot therein, or the ordinary presser-foot may be cut off on a transverse line through the hole 5i therein, and through which passes the sewing needle, and to the portion remaining, the portion which was cut off, or a similar portion may be attached by means of a spring 42, as clearly shown in Figs. 1 and 2.

As the main drive shaft l8 rotates, the worm 2! rotates the worm wheel 21, and thus the cam 26, in synchronism with the reciprocatory motion of the usual needle carried by the machine, and also in synchronism with the bobbin holder l3. The reciprocatory bar 28 is therefore moved to the left, as shown in Fig. 3, by the cam against the tension of the spring 32, and when the rounded end of such bar 28 rides over the top of the cam 26, the spring 32 acts to return the bar 28 to its normal position. Asis apparent, this produces a reciprocatory motion of the pearl edgin blade 39 transversely of the presser-foot i8 and at a point adjacent to the needle passing through the hole 4| in such presser-foot. Therefore the material 54 being fed through the machine by the feeding device, which passes upwardly through the slots 31 in the blade l4 and moving in the direction of the arrow shown in Fig. 1, will have a line of stitching 45 thereon and such stitching will be in a substantially straight line. The pearl edging blade 39, however, moving inwardly to the left as shown in Fig. 1, and transversely to the line of movement of the fabric 44, the fabric 44 will be indented. at spaced intervals, as indicated by the reference numeral 45, and the fabric is distorted to some degree at each indentation, and therefore the line of sewing 45 in the finished article will appear as a wavy line Such cord 49 is attached to the bottom of.

of sewing 5|, the portions of the cord Q9 between each sewing or around the swell of the edging 48 being free.

To assist in. feeding the fabric 44 or Q? through the machine, to have the pearl edging formed thereon, and particularly to assist in feeding the cord 49 I find it advantageous to groove the lower endof the presser-foot l8, as shown by the reference numeral 52 in Fig, 2.

The machine, when my device is used, may be the ordinary sewing machine and therefore adapted to be utilized for a general line of work.

My attachment permits this, and for example, where the work to be done in the machine will not be disturbed because of the presence of the end of the member 26 extending upwardly through the slot 38 of the plate- Hi, all that, is

necessary to disconnect my device from the sew.-

ing machine is to remove the edging blade 39 byv removing the screw it. If however, the type of work to be done on the machine would be inter-' fered with by that portion of the arm 36 extending upwardly through the slot 38 in the plate I4, the arm 33 may be removed from, the

machine. No other work is necessary and no mutilation of the machine is necessary other thanthe provision of threaded holes into which may be placed screws for holding the plate 23 carrying the mechanism above described.

Whereas, I have described my invention by reference to specific forms thereof, it will be understood that manychanges and modifications may be made without departing from the spirit of the invention.

I claim:

In a pearl edging attachment for operating in association with a sewing machine for producing a pearl edge hem on fabric and the like, the combination of a base plate adapted to be mounted on the sewing machine, a reciprocable bar thereon, a cam rotatably mounted on the base plate, and adapted to positively move the reciprocable bar in one direction, resilient means for moving the reciprocable bar in the other j direction, a pearl edging blade carried by said bar and operating in association with the sewing mechanism to produce a pearl edge hem on'fabric and the like, and means for mounting said attachrnent on the under side of the base of a sewin machine and with the pearl edge blade above the base.

. GILBERT FOWLER. 

